Comprehensive microstructural characterization and CMAS infiltration resistance of ytterbium disilicate coatings with lamellar and quasi-columnar structures
Source abstract
Abstract
Degradation by CMAS deposits represents a considerable threat to the EBC service life. Current work contributes to understanding the response of Yb 2Si 2O 7 coatings with lamellar and quasi-columnar structures to CMAS attack. It is revealed that the dual-phase structure in APS coating drastically improved the overall coating resistance to CMAS infiltration by enhancing the apatite-forming capability. The amorphous silica in PS-PVD coatings limited the formation of apatite “sealing” layer. With a continuous degradation of sand-phobic morphology, molten CMAS rapidly penetrated inside the entire coating. This study highlights that microstructure modulation of Yb 2Si 2O 7 coating is a promising strategy for CMAS infiltration mitigation.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · High-Temperature Coating Behaviors · Intermetallics and Advanced Alloy Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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